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ΤΑΥΤΟΤΗΤΕΣ (Γ΄ΓΥΜΝΑΣΙΟΥ)

Authored by Ε. ΚΟΥΚΟΓΙΑ

Mathematics

9th Grade

Used 198+ times

ΤΑΥΤΟΤΗΤΕΣ (Γ΄ΓΥΜΝΑΣΙΟΥ)
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 4x2+9y2=4x^2+9y^2=  

 (2x3y)(2x+3y)\left(2x-3y\right)\left(2x+3y\right)  

 (2x+3y)2\left(2x+3y\right)^2  

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2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 (α3β)(α+3β)=\left(α-3β\right)\left(α+3β\right)=  

 α23β2α^2-3β^2  

 (α+3β)2\left(α+3β\right)^2  

 α29β2α^2-9β^2  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 (x5y)2=\left(x-5y\right)^2=  

 (x5y)(x+5y)\left(x-5y\right)\left(x+5y\right)  

 x225y2x^2-25y^2  

 x210y+25x^2-10y+25  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 x27=x^2-7=  


 (x7)(x+7)\left(x-\sqrt{7}\right)\left(x+\sqrt{7}\right)  

 (x7)(x+7)\left(x-7\right)\left(x+7\right)  

 (x7)2\left(x-7\right)^2  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 (2x)2=\left(2-x\right)^2=  

 42x+x24-2x+x^2  

 44x+x24-4x+x^2  

 22x22^2-x^2  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 (x21)2=\left(\frac{x}{2}-1\right)^2=  

 x241\frac{x^2}{4}-1  

 x22x+1\frac{x^2}{2}-x+1  

 x24x+1\frac{x^2}{4}-x+1  

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 (αβ)3=\left(α-β\right)^3=  

 α33αβ+β3α^3-3αβ+β^3  

 α3+3α2β3αβ2+β3α^3+3α^2β-3αβ^2+β^3  

 α33α2β+3αβ2β3α^3-3α^2β+3αβ^2-β^3  

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